Drilldown: Patents
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Patents > Filing date:
1980 - 1989
& Grant date:
March 1990
& Cites
:
Patent US 4146844A
or
Patent US 4255003A
or
Patent US 4322688A
or
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Brian G. Heintz (1) ·
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Showing below up to 9 results in range #1 to #9.